例句：Who came to school first this morning?

翻譯：今天早上誰第一個來學校？

例句：The first two days of the week are Sunday and Monday.

翻譯：一星期的前兩天是星期日和星期一。

例句：Sunday is the first day of the week.

翻譯：星期日是一週的第一天。